Ethyl 6-(chloromethyl)-3-(difluoromethyl)-2-methylpyridine-4-carboxylate
Ethyl 6-(chloromethyl)-3-(difluoromethyl)-4-methylpyridine-2-carboxylate
Ethyl 2-(chloromethyl)-5-(difluoromethyl)-4-methylpyridine-3-carboxylate
Ethyl 2-(chloromethyl)-5-(difluoromethyl)-3-methylpyridine-6-carboxylate